Description
bool 
ksort ( array &array [, int sort_flags] )
     Sorts an array by key, maintaining key to data correlations. This
     is useful mainly for associative arrays.
    
     Returns TRUE on success or FALSE on failure.
    
     
Example 1. ksort() example 
<?php $fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); ksort($fruits); foreach ($fruits as $key => $val) {     echo "$key = $val\n"; } ?>
 |  
 The above example will output: a = orange
b = banana
c = apple
d = lemon  |  
  | 
    
     You may modify the behavior of the sort using the optional
     parameter sort_flags, for details
     see sort().
    
     See also asort(), arsort(),
     krsort(), uksort(),
     sort(), natsort(), and
     rsort().
    
Note: 
      The second parameter was added in PHP 4.